#!/usr/bin/env ruby
require "json"
require "net/http"
require "uri"

class User
  attr_accessor :id, :name, :email, :active

  def initialize(id:, name:, email:, active: true)
    @id = id
    @name = name
    @email = email
    @active = active
  end

  def to_s
    "#{@name} <#{@email}>"
  end

  def active?
    @active
  end

  def deactivate!
    @active = false
  end
end

class UserRepository
  def initialize
    @users = {}
  end

  def add(user)
    @users[user.id] = user
  end

  def find(id)
    @users[id]
  end

  def find_by_email(email)
    @users.values.find { |u| u.email == email }
  end

  def active_users
    @users.values.select(&:active?)
  end

  def each(&block)
    @users.values.each(&block)
  end

  def to_json(*args)
    @users.values.map(&:to_h).to_json(*args)
  end
end

def fetch_users(url)
  uri = URI.parse(url)
  response = Net::HTTP.get_response(uri)
  raise "HTTP error: #{response.code}" unless response.is_a?(Net::HTTPSuccess)
  JSON.parse(response.body)
rescue StandardError => e
  warn "Failed to fetch users: #{e.message}"
  []
end

def process_items(items)
  items.map { |item| yield item }
end

repo = UserRepository.new
repo.add(User.new(id: 1, name: "Alice", email: "alice@example.com"))

repo.each do |user|
  puts user.to_s
end

puts "Active: #{repo.active_users.size}"